Pore structure control of mesoporous carbon monoliths derived from mixtures of phenolic resin and ethylene glycol

Xu, Shunjian; Li, Jie; Qiao, Guanjun; Wang, Hongjie; Lu, Tianjian

doi:10.1016/j.carbon.2009.03.069

Cited by 67 publications

(46 citation statements)

References 30 publications

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“…Although carbon monoliths have been prepared before [1,2,[7][8][9][10][11][12][13][14][15][16][17], only in the last few years have they been studied as electrodes in their current form, i.e. as an entire piece of carbon [6,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

The contribution of sulfate ions and protons to the specific capacitance of microporous carbon monoliths

Barranco

García-Gómez

Kunowsky

et al. 2014

Journal of Power Sources

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The monoliths studied in this work show large specific surface areas (up to 1600 m 2 g -1 ), high densities (up to 1.17 g cm -3) and high electrical conductivities (up to 9.5 S cm -1 ). They are microporous carbons with pore sizes up to 1.3 nm but most of them below 0.75 nm. They also show oxygen functionalities. The electrochemical behavior of the monoliths is studied in three-electrode cells with aqueous H 2 SO 4 solution as electrolyte. This work deals with the contribution of the sulfate ions and protons to the specific capacitance of carbon monoliths having different surface areas and different contents of oxygen groups. Protons contribute with a pseudocapacitance (up to 152 F g ); both capacitances increase as the surface area increases. The preference of protons to be electroadsorbed at the double layer and the broader voltage window of these ions account for their higher contribution (70 %) to the double layer capacitance.

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Section: Introductionmentioning

confidence: 99%

The contribution of sulfate ions and protons to the specific capacitance of microporous carbon monoliths

Barranco

García-Gómez

Kunowsky

et al. 2014

Journal of Power Sources

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“…Second, good porosity, pore size distribution and mechanical properties can be obtained according to effects of the EG concentrations and types. 18 In the PIPS method using PEG as the NRC, previous studies focused only on the feasibility and formation of the pore structures. On the other hand, in the present article, not only pore structures, but also the mechanical properties, thermal stability and mechanism of the resulting carbon foam were examined with various types and concentrations of glycolderivatives, such as ethylene glycol (EG), diethylene glycol (DEG), and triethylene glycol (TEG) due to the interactions between the glycol-derivatives and carbon precursor during the crosslinking and carbonization process.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of macroporous carbon foam using glycol-derivatives as liquid templates

et al. 2016

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Porous carbon foams were fabricated using phenol and formaldehyde (PF) as carbon precursors. The pore size and porosity of the foams were controlled using glycol-derivatives as porogen during condensation polymerization. The morphology of the resulting carbon foam with macroporous porosity and well dispersed pore structures were verified by mercury porosimetry and scanning electron microscopy. The compressive stress of the resulting carbon foam increased with increasing molecular weights of glycol-derivatives due to the decrease in porosity. Furthermore, the reaction mechanism was identified to involve glycol-derivatives in the condensation reaction of PF, which generated the porosity of the resulting carbon foam by releasing volatile compounds according to thermogravimetric analysis and Fourier transform infrared spectroscopy. As a result, the mechanical properites of the carbon foam could be affected by the morphological properties of macroporous structures using different types and concentrations of glycol-derivatives.

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“…Furthermore, no off-gas and wastewater were produced during vacuum pyrolysis process thus this is an environmentally benign process. As for biomass conversion, vacuum pyrolysis was primarily used for bio-oil production [11][12][13]. In the recent years, researchers started to use vacuum pyrolysis for pretreatment or activation in ACs production, and significant improvements of ACs performance were achieved [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

A clean process for activator recovery during activated carbon production from waste biomass

Zhang

2012

Fuel

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a b s t r a c tChemical activation is a widespread method for activated carbon (AC) preparation, but the removal and recycle of activator from the carbon product are generally a nuisance process. In this study, an environmental benign process, called modified vacuum pyrolysis (MVP) process, was developed for AC production and simultaneous recovery of the activator. The process included two steps: (1) carbonization and activation stage in a vacuum condition; (2) zinc recovery stage in a special temperature and pressure range. In the MVP process, over 99.99 % of the zinc used for activation was recovered in the form of zinc chloride and metallic zinc. The resultant ACs with basic and hydrophobic surface properties displayed higher adsorption capacity for phenol than that of carbons obtained by traditional pyrolysis method. The main merit of the MVP process was that there was no wastewater generation during the whole procedure. Consequently, the experimental data obtained in the present study provided scientific basis for zinc chloride recovery by vacuum pyrolysis during ACs production process.

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Pore structure control of mesoporous carbon monoliths derived from mixtures of phenolic resin and ethylene glycol

Cited by 67 publications

References 30 publications

The contribution of sulfate ions and protons to the specific capacitance of microporous carbon monoliths

The contribution of sulfate ions and protons to the specific capacitance of microporous carbon monoliths

Fabrication of macroporous carbon foam using glycol-derivatives as liquid templates

A clean process for activator recovery during activated carbon production from waste biomass

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